自己早期（android1.1）做的一个绘图练习
仅仅是个练习而已！只做了第一个菜单的事件。其他都没事件。
代码片段
public mPayCanvas(Context context) {super(context); //获得屏幕宽高 WindowManager windowManager = getWindowManager(); Display display = windowManager.getDefaultDisplay(); width = display.getWidth(); height = display.getHeight(); Log.i("TAG", "screenWidth="+width);//320 Log.i("TAG", "screenHeight="+height);//480width=320;height=430;// TODO Auto-generated constructor stubtext=new String[10];paint=new Paint[10];rect=new RectF[10];col=3;//菜单列数state=ST_Instruction;setST(state);setFocusable(true); // 如果要响应按键，必须加上这句clearFocus();//必须加，以防第一次按键时无效。//setClickable(true);setFocusableInTouchMode(true);//setPressed(true);setLongClickable(false);setTitleColor(0xffff0000);}private void draw_Menu(Canvas canvas){//canvas.drawText("菜单", (getWidth()-(int)paint[0].measureText(text[0]))>>1, getHeight()>>1, paint[0]);for(int i=0;i<drawable.length;i++){drawable[i].draw(canvas);canvas.drawText(menu_item[i], drawable[i].getBounds().left, drawable[i].getBounds().bottom+paint[2].getTextSize(), paint[2]);}RectF rect_menu = new RectF(drawable[index].getBounds().left, drawable[index].getBounds().top, drawable[index].getBounds().right, drawable[index].getBounds().bottom+paint[2].getTextSize()+5);canvas.drawRect(rect_menu, paint[3]);drawButton(canvas,true,true); } private void touchEvent_Menu(MotionEvent event){ float x=event.getX();float y=event.getY();if(x>rect[0].left&&x<rect[0].right&&y>rect[0].top&&y<rect[0].bottom){switch (index) {case 0:setST(ST_InputNumber);break;case 1:case 2:case 3:Log.i("TAG", "index====="+index);break;default:break;}return;}else if(x>rect[1].left&&x<rect[1].right&&y>rect[1].top&&y<rect[1].bottom){setST(ST_Exit);return;}int xx=drawable[0].getBounds().left;int yy=drawable[0].getBounds().top;int w=drawable[0].getIntrinsicWidth();//32int h=drawable[0].getIntrinsicHeight()+(int)paint[2].getTextSize();//48+int gapX=xx;int gapY=this.gapY-(int)paint[2].getTextSize();//Log.i("TAG", "w=="+w);// Log.i("TAG", "h=="+h);// Log.i("gapX", "gapX=="+gapX);// Log.i("gapY", "gapY=="+gapY); int indexX=0;int indexY=0;for(int i=0;i<drawable.length;i++){indexX=i%col; indexY=i/col; if (x >= xx+indexX*gapX + indexX * w && x < xx+indexX*gapX + (indexX + 1) * w && y >= yy+indexY*gapY + indexY * h && y < yy+indexY*gapY + (indexY + 1) * h) { this.index=i; this.indexX=indexX; this.indexY=indexY;// Log.i("TAG", "index=="+index);// Log.i("TAG", "indexX=="+indexX);// Log.i("TAG", "indexY=="+indexY);// Log.i("TAG", "=============================================="); keyDown_Menu(KeyEvent.KEYCODE_DPAD_CENTER,null); break; }} }private void drawButton(Canvas canvas,boolean hasLeft,boolean hasRight){ if(hasLeft){ canvas.drawText(text[8], rect[0].left+2, rect[0].bottom-5, paint[0]);// canvas.drawText(text[8], x+5, height-5, paint[0]);// rect[0] = new RectF(2, getHeight()-paint[0].getTextSize()-2-5, 2+paint[0].measureText(text[8])+5, getHeight()-2); canvas.drawRect(rect[0], paint[3]); } if(hasRight){ canvas.drawText(text[9], rect[1].left+2, rect[1].bottom-5, paint[0]);// canvas.drawText(text[9], width-paint[0].measureText(text[9])-2, height-5, paint[0]);// rect[1] = new RectF(getWidth()-paint[0].measureText(text[9])-5, getHeight()-paint[0].getTextSize()-2-5, getWidth()-2, getHeight()-2); canvas.drawRect(rect[1], paint[3]); } } private void drawGrid(Canvas canvas){ String[][] pad={{"1","2","3"},{"4","5","6"},{"7","8","9"},{"退格","0","全清"}}; RectF rect=null; int col=pad[0].length; int row=pad.length; int w=80; int h=60; int x=((width-col*w)>>1); int y=(height>>1)-h*2; for(int i=0;i<row;i++){ for(int j=0;j<col;j++){ rect = new RectF(x+j*w,y+i*h,x+j*w+w,y+h+i*h); canvas.drawRect(rect, paint[3]); canvas.drawText(pad[i][j], rect.left+((int)(w-paint[0].measureText(pad[i][j]))>>1),rect.top+(h>>1)+5, paint[0]); } } }